You are Squadron Leader of the last remaining fighter unit of the Resistance
against Extraterrestrial Invaders. The earth is already either occupied
or destroyed. Only the small lunar outpost was underestimated by the
invaders.It is from here that we are coordinating
your mission to save Humanity from extraterrestrial slavery. You will
begin your attack from the moon. The route will lead you directly through
the enemy forces´ orbit. Should you reach the earth's surface
you must then find the underground accelerator device that will automatically
propel you through the enemies warp satellite, sending you directly
into the heart of the enemy's planetary system. This
is the setting which will determine the fate of humanity.

Control your ship using the Arrow keys.
Press the Ctrl key quickly to spray some fire.
Press longer to load the Beam Cannon which gives a more powerful shot,
but be careful. If you load the Beam Cannon too long, your own ship
might explode.

If things get hairy press the Shift key to
drop one of your bombs.
The number of bombs you have left is shown under the playing field in
yellow points on the left.

Pause the game by pressing the Escape key
or Space Bar.

The highest right bar shows you what your
current bonus factor is: Shoot your enemies as quickly in succession
as possible and this factor will increase and multiply the points scored
for the following hits.
Every 100.000 points gets you a bonus Space Ship.